ESP family
ESP_a176_IBSTEBRNotAvailable
Not Available
What does the ESP_a176_IBSTEBRNotAvailable alert mean?
The Electronic Stability Program (ESP) detects that the iBooster (IBST) electronic control unit (ECU) will not execute any External Brake Requests (EBRs) as they are reported as unavailable.
What you'll see in your Tesla
- Not Available
What triggers it
The IBST ECU reports that EBRs are unavailable.
When it clears
The IBST ECU reports that EBRs are available.
Potential impact
EBRs will not be executed.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.